So, at long last, XMid is completed, for both GBA and DS.
Here are a few specs:
-16 note polyphony (on both GBA and DS)
-Assembler optimized sound mixing (GBA only)
-Assembler written sound code (GBA/DS)
-GBA: ~5KB EWRAM, ~2KB IWRAM
-DS: ~0.7KB ARM7 RAM, ~3KB main RAM
-Four music players, to allow special effect 'songs'
-No timers used on DS (timer 0 used on GBA)
Included are the sources for the conversion tools, and demos, along with all executables and sound data (including Midi files and raw sound data + config file).